Add PlayerProfile API to replace GameProfile

This simply provides the base API to create the objects. Further commits will come that adds
adds usage of this API to existing GameProfile based API's, as well as new API's.

Spigot-Server-Patches/0224-Implement-ensureServerConversions-API.patch

@@ -0,0 +1,27 @@
+From aae8be84bd2b26b5a192bd5f1b6cdc2eb220d051 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Wed, 4 May 2016 22:43:12 -0400
+Subject: [PATCH] Implement ensureServerConversions API
+
+This will take a Bukkit ItemStack and run it through any conversions a server process would perform on it,
+to ensure it meets latest minecraft expectations.
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
+index 49ebad22e..eb6987338 100644
+--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
++++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
+@@ -194,4 +194,11 @@ public final class CraftItemFactory implements ItemFactory {
+     public Color getDefaultLeatherColor() {
+         return DEFAULT_LEATHER_COLOR;
+     }
++
++    // Paper start
++    @Override
++    public ItemStack ensureServerConversions(ItemStack item) {
++        return CraftItemStack.asCraftMirror(CraftItemStack.asNMSCopy(item));
++    }
++    // Paper end
+ }
+-- 
+2.15.1
+